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fifteen years for girls from different rural areas. Average total weight gain during 5, years of study varied from centre to centre and was between 15 to 18 kg. (Table 3).

The adolescent girls from rural as well as urban slum areas in this study had higher body weight than boys. This difference in weight started from 11 and 12 years of age in urban and rural girls respectively. The maximum difference observed in weight of boys and girls was 1.5 kg. around 13.5 to 14.5 years of age for rural group and 3 kg. in urban group around the age of 14 years (Tables 2&3, Fig. 1 & 4)

The percentiles including 3rd, lOth, 50th, 90th and 97th percentile for weight were calculated centrewise for boys and girls in six monthly age groups. The fiftieth centiles for boys and girls were found to be similar to average values at all age points and supported the centrewise variations observed for weight (Tables 14 & 15).

Height:

The boys from urban slums areas had significantly higher (P<0.01) standing height at all age points that, boys from rural areas. Among the urban slum areas, Delhi boys were observed to be taller than Vellore boys. The boys from Vellore urban area were taller than boys from rural Vellore, Varanasi and Jabalpur throughout the adolescent period. Unlike weight, the boys from rural Chandigarh were seen to be taller than boys from other rural areas only upto the age of 12 years. From the age of 12 years onwards the boys from Chandigarh, Hyderabad and, Jabalpur areas were found to have similar height. Boys from Varanasi and Vellore rural areas were smaller than boys from other three rural areas. Maximum gain in height seemed to occur at different points for children from different areas and was between the age of twelve years to fifteen years. Total gain in height from 10 to 16 years varied between 23 cm. for boys from rural Vellore to 31 cm. for boys from urban slum area of Delhi (Table 4, Fig. 3).

The girls from urban slum areas had significantly higher height (P<0.01) that from rural areas included in this study. Unlike boys there was no difference in height of girls from urban slums of Vellore and Delhi. From among the rural areas the girls from Varanasi appeared to be shortest at all age points in the study, followed by Vellore girls. The girls from Hyderabad were seen to be taller than other rural areas throughout the adolescence period and were similar to girls from urban slum area of Vellore (Table 5, Fig. 4).

The average height of girls from the rural areas in this study was similar to that of boys around the age of 13.5 to 14.5 years and less than boys at all other ages.

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